package com.project.util;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

@Component
public class SpringUtil implements ApplicationContextAware{

	private static ApplicationContext applicationContext = null;
	
	@Override
	public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
		 if(SpringUtil.applicationContext == null){
	           SpringUtil.applicationContext  = applicationContext;
	       }
	}
	
	//获取applicationContext
    public static ApplicationContext getApplicationContext() {
       return applicationContext;
    }
   
    //通过name获取 Bean.
    public static Object getBean(String name){
       return getApplicationContext().getBean(name);
    }
   
    //通过class获取Bean.
    public static <T> T getBean(Class<T> clazz){
       return getApplicationContext().getBean(clazz);
    }
   
    //通过name,以及Clazz返回指定的Bean
    public static <T> T getBean(String name,Class<T> clazz){
       return getApplicationContext().getBean(name, clazz);
    }

}
